{{cite journal | last1=Aziz | first1=K. | author2=Z. Ali | author3=Z. A. Nasir | author4=I. Colbeck | year=2015 | title=ASSESSMENT OF AIRBORNE PARTICULATE MATTER (PM2.5) IN UNIVERSITY CLASSROOMS OF VARRYING OCCUPANCY | journal=Journal of Animal and Plant Sciences | volume=25 | issue=3 | pages=383-388 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2015-JAPS-659}}